Chinese Manufacturer of Film Greenhouses

• Customization: Available
• After-sales Service: One Year Warranty
• Warranty: 365
• Model NO.: 2024823237
• Material Quality: Hot DIP Galvanized Steel Pipe
• Surrounding Coverage: Tempering Glass
• Top Coverage: Sunshine Plate
• Transmittance: 99
• Transport Package: Sea and Land Transportation
• Specification: 88.65
• Trademark: HHIE
• Origin: China
• HS Code: 8601109000
• Production Capacity: 5 Million Square Meters

Product Description

Expert in Intelligent Greenhouse Manufacturing in China
Purchasing the cutter suction dredger manufactured by our company can provide you with 1-2 workers to arrive at the site to assist in installation, help you debug all equipment to operate normally until qualified products are produced, and train professional operators to ensure that any problems with the equipment during the later production process can be handled! Multi span greenhouse is a modern agricultural facility, and the selection of materials is crucial for the performance and service life of the greenhouse. The following are common materials used in multi span greenhouses:

**1, Skeleton material**

1. Galvanized steel
-Advantages: It has good strength and stiffness, and can withstand large wind and snow loads. Galvanizing treatment gives it good corrosion resistance and extends its service life.
-Applicable scenarios: Suitable for the construction of multi span greenhouses under various climatic conditions.

2. Aluminum alloy
-Advantages: Lightweight, easy to install and transport. Excellent corrosion resistance and not easy to rust. Beautiful appearance can enhance the overall level of the greenhouse.
-Applicable scenarios: Especially suitable for places with high aesthetic requirements, such as tourist agricultural parks.

**2, Cover material**

1. Glass
-Advantages: High light transmittance, reaching over 90%, can provide sufficient light for crops. Has good insulation performance and impact resistance.
-Disadvantages: High cost, heavy weight, relatively complex installation and maintenance.
-Applicable scenarios: Suitable for the cultivation of high-end flowers, vegetables and other crops, as well as scientific research experiments and other fields.

2. Sunlight board
-Advantages: High transmittance, usually around 80%. Lightweight and easy to install. Good insulation performance and certain impact resistance.
-Disadvantages: The service life is relatively short, and it is prone to aging and yellowing.
-Applicable scenarios: Widely used in ordinary agricultural planting and breeding fields.

3. Thin film
-Advantages: Low cost, easy installation. Good transparency, able to meet the growth needs of most crops.
-Disadvantages: Poor insulation performance, short service life, and need to be replaced regularly.
-Applicable scenarios: Suitable for short-term planting or temporary greenhouse construction.

**3, Sealing material**

1. Rubber sealing strip
-Advantages: It has good elasticity and sealing performance, which can effectively prevent the infiltration of rainwater and air.
-Applicable scenario: Used for sealing between greenhouse frames and covering materials.

2. Sealing glue
-Advantages: Strong adhesion and good sealing effect. Can adapt to different temperature and humidity conditions.
-Applicable scenarios: Used for sealing between glass and frames, as well as sealing treatment of some special parts.

**4, Other materials**

1. Thermal insulation materials
-Common thermal insulation materials include polystyrene foam board, rock wool, glass wool, etc. These materials can be installed on the walls and roofs of greenhouses to improve their insulation performance and reduce energy consumption.

2. Irrigation equipment
-Including drip irrigation pipes, sprinkler irrigation equipment, etc., used to provide water for crops. These devices should be selected from reliable and durable products to ensure irrigation effectiveness and service life.

3. Control system
-Sensors and controllers such as temperature, humidity, and lighting can achieve automatic monitoring and regulation of the greenhouse environment. These devices should have the characteristics of high precision and good stability.

When choosing materials for multi span greenhouses, you need to consider the following factors:

1. Climate conditions: The climate conditions vary greatly in different regions, and materials suitable for the local climate characteristics should be selected. For example, in cold regions, cover materials and skeleton materials with good insulation performance should be selected; In humid areas, materials with strong corrosion resistance should be selected.
2. Crop demand: Different crops have different requirements for environmental conditions such as light, temperature, and humidity. Suitable covering materials and control systems should be selected based on the crops being planted to meet their growth needs.
3. Cost budget: The prices of different materials vary greatly, and suitable materials should be selected based on one's own cost budget. At the same time, the service life and maintenance costs of materials should also be considered to ensure long-term economic benefits.
4. Construction scale: For large-scale connected greenhouses, cost-effective materials can be selected to reduce costs. For small-scale greenhouse construction, high-quality and relatively expensive materials can be selected to improve the performance and service life of the greenhouse.

Glass greenhouse is a modern agricultural facility with numerous unique features and advantages.
The glass greenhouse uses high-strength glass as the covering material, which has good transparency. Adequate sunlight can penetrate glass, providing even and sufficient light for indoor plants, promoting photosynthesis, and facilitating plant growth and development. For example, in flower cultivation, high-quality lighting conditions can make the flowers more vibrant in color and have a longer flowering period.
It has excellent insulation performance. The use of good sealing structure and insulation materials can effectively reduce heat loss and maintain a relatively stable indoor temperature even in cold seasons. When planting vegetables in winter, it can ensure that the vegetables grow in a suitable temperature environment and are not affected by severe cold.

Glass greenhouses can also achieve precise environmental control. By equipping advanced ventilation, cooling, humidification, fertilization and other systems, indoor environmental parameters such as temperature, humidity, and carbon dioxide concentration can be accurately adjusted according to the growth needs of different plants. For example, when planting strawberries, environmental parameters can be adjusted according to the different stages of strawberry growth to improve the yield and quality of strawberries.
In addition, the durability of glass greenhouses is also one of their prominent features. High quality frame structure and glass materials can withstand the test of severe weather conditions, such as strong wind, rainstorm and snow.
Overall, glass greenhouses provide a controllable, stable, and efficient environment for agricultural production, helping to increase the yield and quality of agricultural products and promoting the development of modern agriculture.

 

Greenhouse parameters mainly include the following aspects:
1. Greenhouse size
Length: Usually ranging from tens of meters to hundreds of meters, common ones include 60 meters, 80 meters, 100 meters, etc.
Width: Generally between 8 meters and 16 meters, such as 8 meters, 10 meters, 12 meters, etc.
Height: The ridge height is commonly around 4 to 6 meters, such as 4.5 meters, 5 meters, and 5.5 meters.
2. Coverage material parameters
Glass types: Common ones include ordinary float glass, tempered glass, etc.
Glass thickness: usually between 4 millimeters and 6 millimeters.
Transmittance: The transmittance of high-quality glass can reach over 90%.
3. Temperature parameters
Daytime suitable temperature: Depending on the different crops planted, it is generally between 20 ºC and 30 ºC.
Nighttime minimum temperature: usually not lower than 10 ºC.
4. Humidity parameters
Suitable relative humidity: For most crops, it is between 50% and 80%.
5. Ventilation parameters
Ventilation area: a certain proportion of the total area of the greenhouse to ensure good ventilation.
Ventilation methods: such as natural ventilation, mechanical ventilation, etc.
6. Lighting parameters
Light intensity: The amount of light energy received per unit area, with different crops having different requirements.
7. Load bearing parameters
Snow load: The maximum weight of snow that can be sustained.
Wind load: The maximum wind force level that can be resisted.
For example, in some areas where the snow load is high in winter, the design of greenhouses needs to consider being able to withstand snow pressure of tens of kilograms per square meter; In windy areas, wind load parameters may need to reach a level that can withstand wind speeds of ten or even higher.

The service life of glass greenhouses is usually around 15 to 20 years, but this depends on multiple factors.

If the greenhouse uses high-quality building materials, such as high-quality steel frames and glass with appropriate thickness and excellent quality, and strictly follows design specifications and construction standards during the construction process, coupled with regular maintenance and upkeep in the later stage, its service life may reach 20 years or even longer.

For example, some carefully designed and constructed large modern glass greenhouses, with good maintenance and over 20 years of use, still have stable performance and can meet the needs of agricultural production.

However, if the quality of materials used during construction is poor, or if there are defects in the construction, or if necessary maintenance is lacking during use, such as not clearing snow in a timely manner, not treating rust on the frame, etc., the service life of the glass greenhouse may be shortened to about 10 years or even shorter.

In addition, environmental factors can also have an impact on the service life. Under severe weather conditions, such as frequent strong wind, rainstorm, extreme temperature, etc., the greenhouse structure may also be damaged, thus shortening its service life.

Here are some construction standards for multi span greenhouses:
-* * Structural Parameters * *:
-Span: For multi span greenhouses, it is the distance between the centerlines of adjacent gutters, generally selected according to values such as 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 12, 15m, etc.
-* * Opening * *: Refers to the distance between two adjacent pillars under the gutter, usually selected as 3, 4, or 5 meters, and dedicated greenhouses are not subject to this limitation.
-Roof height: generally controlled within the range of 3.3-6.0m, dedicated greenhouses are not subject to this restriction.
-Slope * *: The slope of a double sloped roof is represented by the angle between the slope and the ground level. In order to save roofing materials and reduce greenhouse costs in snow free areas in the south, it is recommended to choose a temperature of 20 degrees, while in other areas, it is recommended to choose a temperature of 25 degrees.
-* * Lower chord height * *: refers to the height of the lower edge of the main frame of the greenhouse roof from the ground, usually about equal to the height of the crossbeam and eaves trough from the ground. When the span is 6m, it should not be less than 1.8m; When the span is 7-8m, it should not be less than 2.4m; When the span is 9-10m, it should not be less than 3.0m; When the span is 12-15m, it should not be less than 3.6m.
-Skeleton Requirements: The skeleton of a multi span greenhouse is a geometric invariant body composed of components made of various lightweight materials (currently mainly lightweight steel pipes) connected into multiple units. It supports the greenhouse covering materials, operating facilities, and all ancillary equipment installed on it, and is the carrier for bearing the greenhouse's own weight and other loads.
-Load considerations: The loads borne by greenhouse structures include permanent loads (dead loads), variable loads (uniformly distributed live loads on the roof, concentrated loads during construction and maintenance, wind loads, and snow loads), and accidental loads.
-Orientation selection: The orientation of the greenhouse should be considered comprehensively based on the local latitude and main wind direction. Generally speaking, in most latitude regions of China, the orientation of greenhouses should be north-south, so that the lighting in each part of the greenhouse is relatively uniform. Indoor corridors and cultivation beds should be appropriately arranged, or local artificial lighting measures should be taken appropriately to provide sufficient light for crop cultivation areas.
-* * Scale limitation * *: In terms of the greenhouse itself, taking into account ventilation, heat dissipation, cooling, logistics and transportation conditions, it is recommended that the building area of each greenhouse in South China should not exceed 5000m ², and in other areas should not exceed 10000m ². For greenhouses using a wet curtain fan cooling system, in order to reduce the temperature difference inside the greenhouse, the length or width should not exceed 40-60m. For larger greenhouses, effective measures should be taken to ensure their heating, ventilation, cooling, logistics, and transportation performance.

In addition, site selection is also very important:
-Local medium and long-term land use planning should be considered.
-The construction site should have water and power sources that meet production and living conditions, and priority should be given to sites with geothermal and industrial waste heat resources.
-Choose an area with convenient transportation and make full use of the existing local transportation conditions.
-It is advisable to choose areas with sunny, leeward, flat terrain, good engineering geological conditions, and low groundwater levels, and avoid areas with floods, waterlogging, mudslides, wind vents, and frequent hail.
-Keep away from tall buildings, trees, and other obstructions, and ensure that the ground receives no less than 6 hours of sunlight on the winter solstice day.
-At least 3km away from factories or facilities contaminated with dust and other pollutants.
-It shall not be built on basic farmland.
-Large scale construction of multi span greenhouses is not suitable in high-altitude regions.

China Haohang Intelligent Equipment Co., Ltd. specializes in building intelligent glass greenhouses, connected film greenhouses, solar panel greenhouses, and off-season greenhouses!